Improvement in pumps



C. F. 8v S. RIGBY. 3d.

Pumps.

tgnted Aug. 13, 1878.

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Ndm, PHOTO-LITHGRAPHER. WASHINGTON. D C.

zUNITED STAT-Es PATENT OFFICE.

CLARK F. RIGBY AND SETH RIGBY, 3D,IOF SUMMIT CITY, PENNSYLVANIA.

IMPROVEMENT IN PUMPS.

Specification forming part of Letters Patent N0. 206,970, dated August13, 1878; application filed June 21, 1878.

To all whom it may concern.-

Be it known that we, CLARK FREE RIGBY and SETH RIGBY, 3d, of SummitCity, in the county of Venango and State of Pennsylvania, have inventedcertain new and useful Improvements in Pumps 5 and we do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itpertains to make and use it, reference being had to the accompanyingdrawings7 which form part of this speciiication.

Our invention relates to an improvement in pumps for oil-wells; and itconsists in the arrangement and combination of parts that will be morefully described hereinafter, whereby a cheap and effective pump isproduced for deep wells of all kinds.

Figure lis a vertical section of our invention. Figs. 2 and 3 are detailviews of the same.

a represents the cylinder, in which the piston b works, and d c are thetwo water-pas sages, up through which the water or oil is forced towardthe top of the earth. The cylinder and the two water-passages are madeof comm on gas-pipe, and have their ends securely fastened in the twoheads or chambers, c f, which heads are securely connected together byrods or bolts, or by any other suitable devices. By making these partsof gas-pipe the construction of the pump is simplified and greatlycheapened.

In the upper head or chamber, c, at the top of the passage d, is placedthe ball-valve g, and in the lower head, f, at the bottom of the chamberc, is placed a second one, h, while in the bottom of the head itself,just over the top of the perforated induetion-pipej, is placed the thirdvalve, i. All of these valves are made of lead and covered with rubber,which makes them sufficiently heavy to at once sink back into positionagain after being raised by the upward flow of water, and yet softenough to conform accurately to their seats under all circumstances.

Theinlet-pipe j is quite short, and is perforated at its lower end, asshown, and over this pipe is passed the sleeve Z, which has the wire mattached to it, so that it can be adjusted up and down at will. Byallowing this sleeve to cover a portion or all of the perorations, the

inflow of oil through the pump is retarded proportionately, so that itwill be pumped from the well only about as fast as it flows in. As theWire reaches up to the top of the well, the rapidity with which the oilis pumped can be nicely regulated.

At the bottom ofthe passage d there isformed a separate chamber, u, inthe lower head, f, and the outer side of this chamber is full of smallperforations, through which the water or oil is drawn up into thepassage d as the piston Vdescends in the cylinder. By this constructionit will be seen that water or oil is taken into the pump at two places,one for each waterpassage, thereby increasing the quantity that isforced upward at each movement of the piston.

Passed over the piston-rod, and resting in the top entrance to thecylinder in the head c, is the removable valve-seat o, upon the top ofwhich seat is placed the valve q. This valve rises and falls vertically,is composed of a sheet of rubber and a metal plate, and serves toprevent the water or oil from passing from the stand-pipe p down intothe cylinder. Iivoted in the sides of this seat o, which is perforatedall around, so as to let the water pass freely through, are the twocatches r, which, as the seat settles into place, catch under theshoulders s, so as to prevent the seat from being displaced. Fastened tothe piston-rod, above and below this seat, are the collars, projections,or other suitable devices, t zi, by means of which this is operated.

When the piston-rod having piston b, of any suitable construction, onits lower end, is lowered into the pump, the seat is guided intoposition by the rod, and then the collar t forces it ho'me. When it isdesired to withdraw the piston for the purpose of cleaning the pump, thepisten-rod is drawn upward, when the lower collar, c, at a suitabledistance above the piston, enters the seat, strikes against the upperproA jecting ends of the catches, and thus loosens thelower ends fromunder the shoulders s, when the valveseat can be raised up with thepiston. As the piston descends, when the pump is in operation, it formsa vacuum in the chamber d and the cylinder a, which causes them to tillwith water, and when it aseends it forces all the water or oil abovevalve g up into the stand-pipe, at the same time that it draws seat,passed over the piston-rod, and provided with catches for catching underthe shoulders s, with the collars t r, substantially as set forth.

1n testimony that we claim the foregoing we have hereunto set our handsthis 13th day of May, 18TH.

(LARK FREE RIGBY. SETH RIGBY, 3D.

Witnesses:

HOMER STEVENsoN, JoHN S'roors.

